How to access to element of a class by string name in flutter

Question

I get name of font awesome from api that I want to access element of font_awesome_flutter package but I know it in C# but I do not know in flutter: received from server:

{
  "fontawesomeName":"breadSlice"
}

in font_awesome package I can access its element by below

 IconButton(
            icon: FaIcon(FontAwesomeIcons.breadSlice),
             onPressed: () { print("Pressed"); }
           )

But How do I access element of object with string name in flutter?

why do you want to access it using string? is not the current syntax enough for your use case? — Darish
– Darish, Commented Feb 29, 2020 at 8:50
and a simple switch case statement can convert those strings into class members if you really want to access class members using string id. — Darish
– Darish, Commented Feb 29, 2020 at 8:51
yes, you can compare the string name using if-else statement or switch statement or crate a map of elements. — Darish
– Darish, Commented Feb 29, 2020 at 9:01

Ovidiu · Accepted Answer · 2020-02-29 08:58:05Z

1

This is not possible in Flutter because reflection is disabled. The only way is to create a mapping. For example:

const Map<String, IconData> map = {
  "breadSlice": FontAwesomeIcons.breadSlice,
};

IconData getIcon(String iconName) {
  return map[iconName];
}

answered Feb 29, 2020 at 8:58

Ovidiu

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Comments

Gazihan Alankus · Accepted Answer · 2020-02-29 08:56:23Z

0

Getting elements by their name in a string is called "reflection". I vaguely remember that regular Dart had it but Flutter's Dart did not.

However, this package may be helpful: https://pub.dev/packages/reflectable

answered Feb 29, 2020 at 8:56

Gazihan Alankus

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